2013 Kawasaki Kx 450 on 2040-motos

Kawasaki KX description

The KX450F has been updated for 2013 to help continue its back-to-back string of recent championships. The string began with Monster Energy Kawasaki's Ryan Villopoto winning both the 2011 Supercross and 2011 Motocross titles, followed by leading the U.S. team to an overall victory at the Motocross of Nations, then Villopoto's absolute domination of the Monster Energy Cup which also earned him the Monster Million. Last but not least, Villopoto recently defended his Supercross title by winning the 2012 championship on his KX450F!At A Glance... New Kayaba Pneumatic Spring Fork (PSF) replaces the main fork springs with compressed air to reduce weight, provide easier and more effective tuning and improve bottoming resistance Revised engine tuning offers more power and smoother delivery from basement revs through mid and into the upper rpm range; this provides more thrust while exiting corners and all the way down the straights, while also enhancing rider confidence Revised piston crown improves ultra-low to mid-range engine response Revised intake cam features slightly less lift, to promote better low-rpm throttle response New front master cylinder features a knocker-style lever-to-piston interface for improved feel and more consistent performance than the old piston-type unit New longer, lower density grips make life easier on the rider's hands. They also extend further towards the center of the handle bars, allowing riders to move their hands up to 20mm closer together New lightweight 240mm petal-type rear rotor features the same aggressive petal style as the front rotor and is gripped by a single piston hydraulic rear caliper Launch Control improves low-gear acceleration by helping to reduce wheelspin during the run to the 1st corner Pre-programmed ignition maps are interchangeable trackside, no PC required Adjustable 4-position handlebar and 2-position footpegs allow riders to fit the KX to match their personal preference Black Anodized Aluminum rims for a factory lookEngine Overview 449cc liquid-cooled, DUAL OVERHEAD CAM, four-stroke single with legendary Kawasaki power! Works-based Bridged-box Bottom piston has optimum rigidity for max high-rpm power and durability A forward lean angle of three puts the engine in the ideal position for max traction Highly balanced crankshaft, on par with Villopoto's factory racer, creates minimal vibration and has a high inertial mass to help maximize rear wheel traction Compact cylinder head is only 100mm tall Double valve springs help ensure stable valve operation and also allow for a short cylinder head height Camshafts, lobes and tappet surfaces feature a soft-nitride treatment for long wear and high-rpm reliability Automatic cam chain adjuster is maintenance-free Crankshaft and connecting rod feature a special carburizing and quenching treatment to maximize rigidity, boosting longterm reliability without adding weightDigital Fuel Injection Digital Fuel Injection (DFI) self-adjusts to atmospheric changes for easier starting, sharper throttle response and accessible power for jumping It is not necessary to re-tune, or change any jets to suit climatic conditions like carbureted models Ultra-fine atomizing injector with twelve holes sprays particles with a droplet size of 60 for smooth power delivery and engine response throughout the throttle range 43mm throttle body uses a progressive throttle linkage to deliver airflow in much the same way as an FCR carburetor Using 2 linked shafts, the throttle body opens more quickly after reaching the 3/8 open position Fast-idle knob on the throttle body allows riders to increase engine speed when starting a cold engine Fuel injector set at 45, the optimum angle for mid-range power Revised airbox flap helps prevent mud and water from entering, but has enlarged access hole to simplify air filter maintenanceHigh-performance Multi-map ECU Revised ignition timing boosts response when re-opening the throttle after deceleration (when landing jumps, etc.) ECU programming is easily selectable via interchangeable DFI coupler caps that provide 3 preprogrammed maps for Standard, Hard (terrain) and Soft (terrain), without the need for a programming computer The engine can be started with only 3 rotations of the crankshaft using the electricity generated by a single kick of the starter, no battery needed The system delivers electricity to the bike's electronics in sequence: 1st the ECU, then the fuel pump, and finally the injector for quick, easy starting The compact, lightweight ECU, located on the front of the steering head behind the number plate, was designed specifically for motocross use. The fuel pump relay is integrated with the ECU to help cope with the shocks and vibrations of tough racingLaunch Control Mode Factory-style launch control system increases the ability to get good starts, by maximizing available traction Push-button activation of the Launch Control Mode retards ignition timing in 1st and 2nd gears, giving the greatest effect within the 1st few seconds of releasing the clutch Launch Control can be activated in neutral, 1st or 2nd gear Shifting into 3rd gear automatically deactivates Launch Control Mode and returns the ignition to normal mapping System is designed to same specifications as factory Kawasaki AMA machinesEasy Starting Strong output from the large ACG rotor provides enough electrical power for the battery-less FI system to enable true one-kick starting without using a battery Equipped with an automatic compression release (ACR) system for quick and easy starting. The dual-weight centrifugal decompression system is fitted to the exhaust cam Compression release features 1.0mm of valve lift, to minimize the required kicking powerBridged-Box Bottom Piston Revised piston crown improves ultra-low to mid-range engine response Same design as pre-owned on our factory racers; offers optimum performance at all rpm Lighter and more durable than traditional piston designs Short piston skirt features low-friction coating to minimize mechanical losses Reinforced external ribs enhance strength and durabilityPSF Front Fork New 48mm KYB Pneumatic Spring Fork (PSF) eliminates the main fork springs by using compressed air as a spring. The reduced weight and inertia of the air spring improves smoothness and enhances the fork's ability to follow terrain contours Air spring significantly reduces friction and cuts weight by 1.7 pounds. per set, while also providing better bottoming resistance, less oil contamination, plus easier and more effective tuning Larger 32mm diameter internal damping cartridges allow the use of pistons with approx twice the surface area as last year's 24mm AOS damper pistons. This provides more consistent performance and enhances bottoming resistance A removable spring pressure adjustment valve is included to simplify connection of an air pump Diamond-Like Carbon (DLC) coating on the outer surface of the inner fork tubes offers min stiction when the fork is exposed to lateral forces that would usually hamper slide action. The result is improved fork response, especially during cornering Friction-reducing Kashima Coat on the inside of the fork's outer tubes contributes to smooth suspension action (especially at the initial part of the stroke) Wrap-around fork tube guards offer effective protection for the sliders New lower triple clamp features integrated loc